/*
 * Copyright (c) 2016, Liu Dong
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 *
 *  Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.qihoo360.replugin.ext.parser.utils.xml;

import java.io.IOException;
import java.io.Writer;

/**
 * Helper subclass to CharSequenceTranslator to remove unpaired surrogates.
 */
class UnicodeUnpairedSurrogateRemover extends CodePointTranslator {
    /**
     * Implementation of translate that throws out unpaired surrogates.
     * {@inheritDoc}
     */
    @Override
    public boolean translate(int codepoint, Writer out) throws IOException {
        if (codepoint >= Character.MIN_SURROGATE && codepoint <= Character.MAX_SURROGATE) {
            // It's a surrogate. Write nothing and say we've translated.
            return true;
        } else {
            // It's not a surrogate. Don't translate it.
            return false;
        }
    }
}

